EP1583895B1 - Cylinder head for a direct injection internal combustion engine - Google Patents

Cylinder head for a direct injection internal combustion engine Download PDF

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Publication number
EP1583895B1
EP1583895B1 EP03750475A EP03750475A EP1583895B1 EP 1583895 B1 EP1583895 B1 EP 1583895B1 EP 03750475 A EP03750475 A EP 03750475A EP 03750475 A EP03750475 A EP 03750475A EP 1583895 B1 EP1583895 B1 EP 1583895B1
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EP
European Patent Office
Prior art keywords
cylinder head
injection nozzle
fuel injection
head cover
intermediate carrier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03750475A
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German (de)
French (fr)
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EP1583895A2 (en
Inventor
Roland Thiel
Andre KÜSTERS
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FEV Europe GmbH
Original Assignee
FEV Motorentechnik GmbH and Co KG
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Publication date
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Publication of EP1583895A2 publication Critical patent/EP1583895A2/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/242—Arrangement of spark plugs or injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/14—Direct injection into combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a cylinder head for a direct injection internal combustion engine having a fuel injector disposed between two camshafts, comprising a cylinder head cover having a fuel injection nozzle entry port, a fuel injector bottom seat, and a passage extending from the passage to the cylinder head floor. the fuel injection nozzle enclosing sealing sleeve.
  • a device for fastening an injection nozzle, in particular on the cylinder head of an internal combustion engine in which a loose flange acts on a separate from the injection nozzle cylindrical clamping element, which is preferably designed as a pressure sleeve.
  • This pressure sleeve acts together at the end remote from the flange with a clamping shoulder that can be arranged separately in the outer circumference of the injection nozzle.
  • the flange acts biased by means arranged in the cylinder head bolts on the injection nozzle. First nuts on the bolts serve to define a cover on the cylinder head, while second nuts act on the flange.
  • a cylinder head of an internal combustion engine with an injection nozzle which is comprised of a fork-shaped clamping claw and is acted upon, wherein in the cylinder head a bolt for fixing and biasing the clamping claw and a support surface are provided for one end of the clamping claw. Injection nozzle and clamping claw are completely below a cover of the cylinder head.
  • the invention has for its object to provide a cylinder head for a direct-injection internal combustion engine of the type mentioned above, which allows a space-saving, simple and easy maintenance mounting of the fuel injector while protecting the oil circuit against fuel contamination.
  • a cylinder head of the aforementioned type in which an intermediate carrier is provided, the sealing sleeve is fitted in the intermediate carrier and guided in the intermediate carrier, and on the cylinder head cover adjacent to the passage opening a Spannpratzenage and a support surface are provided for one end of a clamping claw.
  • a fuel injector in the fixedly installed in the cylinder head sealing sleeve can be clamped by a clamping claw with the sealing sleeve.
  • the oil circuit is protected by the sealing sleeves against fuel contamination. If the fuel injector leaks The fuel is discharged via the sealing sleeves to the cylinder head cover, where it can drain without penetrating into the cylinder head.
  • the clamping claw is tensioned by a cap nut. To remove the fuel injector therefore only a screw is to be solved.
  • An intermediate carrier is provided which can be connected to both the cylinder head cover and the cylinder head.
  • the sealing sleeves are suitably guided only by the intermediate carrier, so that the cylinder head cover can be easily removed, for example, for maintenance of other parts in the interior of the cylinder head and only has passage openings for the fuel injector.
  • passage openings in the intermediate carrier are chamfered in order to use a sealing ring or the like, which seals both against the sealing sleeve and against the cylinder head cover.
  • the fuel injection nozzle expediently has a circumferential shoulder on which an, for example, fork-shaped end of the clamping claw can be placed in order to exert a force acting in the direction of the cylinder head floor on the fuel injection nozzle during clamping.
  • a circumferential shoulder on which an, for example, fork-shaped end of the clamping claw can be placed in order to exert a force acting in the direction of the cylinder head floor on the fuel injection nozzle during clamping.
  • two lateral shoulders or pockets may be provided.
  • Fig. 1 and 2 shown portion of a cylinder head 1 comprises a cylinder head cover 2, a cylinder head bottom 3, valves 4 and standing between two not shown, parallel to Fig. 1 extending camshaft fuel injection nozzles 5, which are inserted in sealing sleeves 6.
  • the sealing sleeves 6 form from the cylinder head cover 2 through the cylinder head 1 to the cylinder head bottom 3 extending, sealed against the cylinder head interior channels.
  • the sealing sleeves 6 as shown in a seat 7 in the cylinder head base 3 can be sealingly secured and extend through the cylinder head 1 to passages 8 for the fuel injectors 5 in the cylinder head cover 2.
  • a passage opening of the intermediate carrier 9 expediently has a chamfer 10 into which a sealing ring is inserted in order to seal off the intermediate carrier 9 with respect to the cylinder head cover 2 and the sealing sleeve 6.
  • the illustrated intermediate carrier 9 is screwed both to the cylinder head cover 2 and to the cylinder head 1.
  • the fuel injection nozzles 5 are clamped in a sealing manner with the sealing sleeve 6 by a clamping claw 13 arranged on the cylinder head cover 2.
  • the cylinder head cover 2 a Spannpratzenage, which may be a pin 14 as shown, which extends through a corresponding hole in the clamping claw 13 and has at its free end a thread for receiving a cap nut 15.
  • the pin 14 may be integrally formed with the cylinder head cover 2 or inserted into this or screwed to it.
  • the pin 14 also serves to screw the cylinder head cover 2 with the intermediate carrier 9.
  • the pin 14, a screw 16 may be provided.
  • One end 17 of the clamping claw 13 is supported on a support surface 18 on the cylinder head cover 2.
  • Another end 19 is engaged with the fuel injector 5 so that it can exert a force directed toward the cylinder head bottom 3 upon tightening the cap nut 15 to the fuel injector 5.
  • the end 19 forked the Embrace fuel injector 5 and press on a not shown, preferably circumferential shoulder at the free end of the fuel injector 5.
  • two pads or pockets 20 or the like Provided instead of the shoulder, see. Fig. 4 , The end 19 may also engage in a groove on the fuel injector 5.
  • the circumferential gap remaining between the fuel injection nozzle 5 and the cylinder head cover 2 can be sealed against environmental influences (e.g., dust) with, for example, a felt gasket. Leakage fuel may leak through this seal and be displayed or collected in a leakage line and returned to the fuel system.
  • environmental influences e.g., dust

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

The invention relates to a cylinder head (1) for a direct injection internal combustion engine, which has a fuel injection nozzle (5) that is vertically arranged between two camshafts. The cylinder head is provided with a cylinder head cover (2), which comprises a passage opening (8) for inserting the fuel injection nozzle (5), with a seat, which is located at the bottom while serving to accommodate the fuel injection nozzle (5), and with a sealing sleeve (6), which extends from the passage opening (8) to the cylinder head bottom (3) while surrounding the fuel injection nozzle (5). An intermediate support (9) is provided, the sealing sleeve (6) is fit into the intermediate support (9) while guided therein, and a clamping claw holding fixture and a supporting surface (18) for one end of a clamping claw (13) are provided on the cylinder head cover (2) next to the passage opening (8).

Description

Die Erfindung betrifft einen Zylinderkopf für eine direkteinspritzende Brennkraftmaschine, der eine zwischen zwei Nockenwellen stehend angeordnete Kraftstoffeinspritzdüse aufweist, mit einer Zylinderkopfhaube, die eine Durchtrittsöffnung zum Einsetzen der Kraftstoffeinspritzdüse umfaßt, einem bodenseitigen Sitz für die Kraftstoffeinspritzdüse und einer sich von der Durchtrittsöffnung bis zum Zylinderkopfboden erstreckenden, die Kraftstoffeinspritzdüse umschließenden Dichthülse.The invention relates to a cylinder head for a direct injection internal combustion engine having a fuel injector disposed between two camshafts, comprising a cylinder head cover having a fuel injection nozzle entry port, a fuel injector bottom seat, and a passage extending from the passage to the cylinder head floor. the fuel injection nozzle enclosing sealing sleeve.

Zur Befestigung einer sich durch einen gattungsgemäßen Zylinderkopf erstrekkenden Kraftstoffeinspritzdüse ist aus der DE 196 05 934 C1 ein Bügel bekannt, der ein mittig angeordnetes Langloch zum Aufsetzen auf eine Schulter der eingesetzten Kraftstoffeinspritzdüse aufweist und an beiden Seiten des Langlochs mit dem Zylinderkopf verschraubt ist. Diese Befestigung belegt wegen der beiden Verschraubungen eine unnötig große Oberfläche des Zylinderkopfs und erfordert zwei Schraubenvorrichtungen an dessen Oberfläche, die zum Ausbau der Kraftstoffeinspritzdüse gelöst werden müssen. Ferner werden beim Ausbau der Kraftstoffeinspritzdüse Teile des Zylinderkopfs freigelegt. Dies erfordert erhöhte Sorgfalt bei Wartungsarbeiten, um Verunreinigungen des Zylinderkopfinneren zu vermeiden. Zudem tritt bei einer gegebenenfalls auftretenden Undichtigkeit der Kraftstoffeinspritzdüse Kraftstoff in den Zylinderkopf ein. Hierdurch kommt es zu einer Verdünnung des Öls im Ölkreislauf.To attach a erstrekkenden by a generic cylinder head fuel injector is from the DE 196 05 934 C1 a bow known, which has a centrally located slot for placing on a shoulder of the fuel injector used and is bolted to both sides of the slot with the cylinder head. This attachment occupies an unnecessarily large surface of the cylinder head due to the two screw connections and requires two screw devices on its surface, which must be solved to remove the fuel injector. Further, parts of the cylinder head are exposed when the fuel injection nozzle is removed. This requires increased care during maintenance work to avoid contamination of the cylinder head interior. In addition, occurs in an optionally occurring leakage of the fuel injector fuel in the cylinder head. This leads to a dilution of the oil in the oil circuit.

Zur Vermeidung des Kraftstoffeintritts in den Ölkreislauf ist es aus der DE 43 15 233 A1 bekannt, eine Dichthülse um die Kraftstoffeinspritzdüse vorzusehen. Die Befestigung erfolgt über eine im Zylinderkopf angeordnete Spannpratze, die sich auf einer Seite im Zylinderkopf und auf der anderen Seite auf einer Schulter der Dichthülse abstützt und mit dem Zylinderkopf verschraubt wird, um die Dichthülse abdichtend gegen den Zylinderkopfboden zu drücken. Die Kraftstoffeinspritzdüse ist mit einer Schulter in der Dichthülse derart im Eingriff, daß sie gegen einen Sitz im Zylinderkopfboden gedrückt wird. Bei dieser Anordnung ist die Kraftstoffeinspritzdüse nur nach Demontage der Zylinderkopfhaube ausbaubar. Zudem hat die Spannpratze im Zylinderkopf einen großen Platzbedarf.To avoid the fuel entering the oil circuit, it is out of the DE 43 15 233 A1 known to provide a sealing sleeve around the fuel injector. The attachment via a arranged in the cylinder head clamping claw, which is supported on one side in the cylinder head and on the other side on a shoulder of the sealing sleeve and bolted to the cylinder head to press the sealing sleeve sealingly against the cylinder head floor. The fuel injector is engaged with a shoulder in the sealing sleeve such that it is pressed against a seat in the cylinder head floor. In this arrangement, the fuel injector is removable only after disassembly of the cylinder head cover. In addition, the clamping claw in the cylinder head has a large footprint.

Aus der EP 0 735 267 B1 ist eine Vorrichtung zur Befestigung einer Einspritzdüse insbesondere am Zylinderkopf einer Brennkraftmaschine bekannt, bei der ein Losflansch auf ein von der Einspritzdüse gesondertes zylinderförmiges Spannelement einwirkt, das vorzugsweise als Druckhülse gestaltet ist. Diese Druckhülse wirkt am flanschfernen Ende mit einer im Außenumfang der Einspritzdüse gesondert anordbaren Spannschulter zusammen. Der Flansch wirkt mittels im Zylinderkopf angeordneter Schraubbolzen vorgespannt auf die Einspritzdüse ein. Erste Muttern auf den Schraubbolzen dienen hierbei der Festlegung einer Abdeckhaube am Zylinderkopf, während zweite Muttern auf den Flansch einwirken.From the EP 0 735 267 B1 a device for fastening an injection nozzle, in particular on the cylinder head of an internal combustion engine is known, in which a loose flange acts on a separate from the injection nozzle cylindrical clamping element, which is preferably designed as a pressure sleeve. This pressure sleeve acts together at the end remote from the flange with a clamping shoulder that can be arranged separately in the outer circumference of the injection nozzle. The flange acts biased by means arranged in the cylinder head bolts on the injection nozzle. First nuts on the bolts serve to define a cover on the cylinder head, while second nuts act on the flange.

Aus der EP 0 821 155 B1 ist ein Zylinderkopf einer Brennkraftmaschine mit einer Einspritzdüse bekannt, die von einer gabelförmigen Spannpratze umfaßt und beaufschlagt wird, wobei im Zylinderkopf ein Schraubbolzen zur Fixierung und Vorspannung der Spannpratze und eine Abstützfläche für ein Ende der Spannpratze vorgesehen sind. Einspritzdüse und Spannpratze liegen vollständig unterhalb einer Abdeckhaube des Zylinderkopfes.From the EP 0 821 155 B1 a cylinder head of an internal combustion engine with an injection nozzle is known, which is comprised of a fork-shaped clamping claw and is acted upon, wherein in the cylinder head a bolt for fixing and biasing the clamping claw and a support surface are provided for one end of the clamping claw. Injection nozzle and clamping claw are completely below a cover of the cylinder head.

Der Erfindung liegt die Aufgabe zugrunde, einen Zylinderkopf für eine direkteinspritzende Brennkraftmaschine der eingangs genannten Art zu schaffen, der eine platzsparende, einfache und wartungsfreundliche Befestigung der Kraftstoffeinspritzdüse ermöglicht und gleichzeitig den Ölkreislauf gegen Kraftstoffverunreinigungen schützt.The invention has for its object to provide a cylinder head for a direct-injection internal combustion engine of the type mentioned above, which allows a space-saving, simple and easy maintenance mounting of the fuel injector while protecting the oil circuit against fuel contamination.

Diese Aufgabe wird durch einen Zylinderkopf der vorgenannten Art gelöst, bei welchem ein Zwischenträger vorgesehen ist, die Dichthülse in den Zwischenträger eingepaßt und im Zwischenträger geführt ist, und auf der Zylinderkopfhaube benachbart zur Durchtrittsöffnung eine Spannpratzenaufnahme und eine Abstützfläche für ein Ende einer Spannpratze vorgesehen sind.This object is achieved by a cylinder head of the aforementioned type, in which an intermediate carrier is provided, the sealing sleeve is fitted in the intermediate carrier and guided in the intermediate carrier, and on the cylinder head cover adjacent to the passage opening a Spannpratzenaufnahme and a support surface are provided for one end of a clamping claw.

Hierbei ist eine Kraftstoffeinspritzdüse in die fest in den Zylinderkopf eingebaute Dichthülse einsteck- und über eine Spannpratze mit der Dichthülse verspannbar. Beim Ein- oder Ausbau der Kraftstoffeinspritzdüse liegen weder Teile des Zylinderkopfes frei, noch muß dieser hierfür geöffnet werden. Es ergibt sich ein erheblich verringerter Wartungsaufwand.Here, a fuel injector in the fixedly installed in the cylinder head sealing sleeve and can be clamped by a clamping claw with the sealing sleeve. When installing or removing the fuel injector neither parts of the cylinder head are free, nor must it be opened for this purpose. This results in a significantly reduced maintenance.

Zudem ist der Ölkreislauf durch die Dichthülsen gegen Kraftstoffverunreinigungen geschützt. Bei Undichtigkeit der Kraftstoffeinspritzdüse wird der Kraftstoff über die Dichthülsen zur Zylinderkopfhaube abgeführt, wo er ablaufen kann, ohne in den Zylinderkopf einzudringen.In addition, the oil circuit is protected by the sealing sleeves against fuel contamination. If the fuel injector leaks The fuel is discharged via the sealing sleeves to the cylinder head cover, where it can drain without penetrating into the cylinder head.

In einer Ausführungsform wird die Spannpratze durch eine Hutmutter gespannt. Zum Ausbau der Kraftstoffeinspritzdüse ist daher lediglich eine Schraubverbindung zu lösen.In one embodiment, the clamping claw is tensioned by a cap nut. To remove the fuel injector therefore only a screw is to be solved.

Es ist ein Zwischenträger vorgesehen, der sowohl mit der Zylinderkopfhaube als auch mit dem Zylinderkopf verbunden sein kann. Die Dichthülsen sind zweckmäßigerweise nur durch den Zwischenträger geführt, so daß die Zylinderkopfhaube beispielsweise für Wartungsarbeiten an anderen Teilen im Inneren des Zylinderkopfs problemlos abgenommen werden kann und lediglich Durchtrittsöffnungen für die Kraftstoffeinspritzdüse aufweist. Vorzugsweise sind Durchtrittsöffnungen im Zwischenträger abgeschrägt, um einen Dichtring oder dgl. einsetzen zu können, der sowohl gegenüber der Dichthülse als auch gegenüber der Zylinderkopfhaube abdichtet.An intermediate carrier is provided which can be connected to both the cylinder head cover and the cylinder head. The sealing sleeves are suitably guided only by the intermediate carrier, so that the cylinder head cover can be easily removed, for example, for maintenance of other parts in the interior of the cylinder head and only has passage openings for the fuel injector. Preferably, passage openings in the intermediate carrier are chamfered in order to use a sealing ring or the like, which seals both against the sealing sleeve and against the cylinder head cover.

Die Kraftstoffeinspritzdüse weist zweckmäßigerweise eine umlaufende Schulter auf, auf welche ein beispielsweise gabelförmiges Ende der Spannpratze aufsetzbar ist, um beim Festspannen eine in Richtung auf den Zylinderkopfboden wirkende Kraft auf die Kraftstoffeinspritzdüse auszuüben. Alternativ hierzu können beispielsweise zwei seitliche Schultern oder Taschen vorgesehen sein.The fuel injection nozzle expediently has a circumferential shoulder on which an, for example, fork-shaped end of the clamping claw can be placed in order to exert a force acting in the direction of the cylinder head floor on the fuel injection nozzle during clamping. Alternatively, for example, two lateral shoulders or pockets may be provided.

Weitere Ausgestaltungen der Erfindung sind der nachfolgenden Beschreibung und den Unteransprüchen zu entnehmen.Further embodiments of the invention are described in the following description and the dependent claims.

Die Erfindung wird nachstehend anhand von den in den beigefügten Abbildungen dargestellten Ausführungsbeispielen näher erläutert.

  • Fig. 1 zeigt einen Abschnitt eines Zylinderkopfs im Längsschnitt.
  • Fig. 2 zeigt den Abschnitt aus Fig. 1 in Draufsicht.
  • Fig. 3 zeigt einen Schnitt durch eine im Zylinderkopf aus Fig. 1 und 2 montierte Kraftstoffeinspritzdüse.
  • Fig. 4 zeigt eine weitere Ausführungsform einer Kraftstoffeinspritzdüse.
The invention is explained in more detail below with reference to the embodiments illustrated in the accompanying drawings.
  • Fig. 1 shows a section of a cylinder head in longitudinal section.
  • Fig. 2 shows the section Fig. 1 in plan view.
  • Fig. 3 shows a section through a in the cylinder head Fig. 1 and 2 mounted fuel injector.
  • Fig. 4 shows a further embodiment of a fuel injector.

Der in Fig. 1 und 2 gezeigte Abschnitt eines Zylinderkopfs 1 umfaßt eine Zylinderkopfhaube 2, einen Zylinderkopfboden 3, Ventile 4 und stehend zwischen zwei nicht dargestellten, parallel zur Fig. 1 verlaufenden Nockenwellen angeordnete Kraftstoffeinspritzdüsen 5, die in Dichthülsen 6 eingesetzt sind.The in Fig. 1 and 2 shown portion of a cylinder head 1 comprises a cylinder head cover 2, a cylinder head bottom 3, valves 4 and standing between two not shown, parallel to Fig. 1 extending camshaft fuel injection nozzles 5, which are inserted in sealing sleeves 6.

Durch die Dichthülsen 6 bilden sich von der Zylinderkopfhaube 2 durch den Zylinderkopf 1 bis zum Zylinderkopfboden 3 erstreckende, gegenüber dem Zylinderkopfinneren abgedichtete Kanäle. Hierzu können die Dichthülsen 6 wie dargestellt in einem Sitz 7 im Zylinderkopfboden 3 abdichtend befestigt sein und sich durch den Zylinderkopf 1 bis zu Durchtrittsöffnungen 8 für die Kraftstoffeinspritzdüsen 5 in der Zylinderkopfhaube 2 erstrecken. Dort sind sie mit der Zylinderkopfhaube 2 oder gegebenenfalls mit einem Zwischenträger 9 kraft- oder formschlüssig verbunden. Hierbei weist eine Durchtrittsöffnung des Zwischenträgers 9 zweckmäßigerweise eine Abschrägung 10 auf, in welche ein Dichtring eingesetzt ist, um den Zwischenträger 9 gegenüber der Zylinderkopfhaube 2 und der Dichthülse 6 abzudichten. Der dargestellte Zwischenträger 9 ist sowohl mit der Zylinderkopfhaube 2 als auch mit dem Zylinderkopf 1 verschraubt.Through the sealing sleeves 6 form from the cylinder head cover 2 through the cylinder head 1 to the cylinder head bottom 3 extending, sealed against the cylinder head interior channels. For this purpose, the sealing sleeves 6 as shown in a seat 7 in the cylinder head base 3 can be sealingly secured and extend through the cylinder head 1 to passages 8 for the fuel injectors 5 in the cylinder head cover 2. There they are positively or positively connected to the cylinder head cover 2 or optionally with an intermediate carrier 9. In this case, a passage opening of the intermediate carrier 9 expediently has a chamfer 10 into which a sealing ring is inserted in order to seal off the intermediate carrier 9 with respect to the cylinder head cover 2 and the sealing sleeve 6. The illustrated intermediate carrier 9 is screwed both to the cylinder head cover 2 and to the cylinder head 1.

Wie in Fig. 2 und 3 gezeigt werden die Kraftstoffeinspritzdüsen 5 durch eine an der Zylinderkopfhaube 2 angeordnete Spannpratze 13 abdichtend mit der Dichthülse 6 verspannt. Hierzu weist die Zylinderkopfhaube 2 eine Spannpratzenaufnahme auf, die wie dargestellt ein Stift 14 sein kann, der sich durch ein entsprechendes Loch in der Spannpratze 13 erstreckt und an seinem freien Ende ein Gewinde zur Aufnahme einer Hutmutter 15 aufweist. Der Stift 14 kann einstückig mit der Zylinderkopfhaube 2 ausgebildet oder in diese eingesetzt bzw. mit dieser verschraubt sein. Zweckmäßigerweise dient der Stift 14 auch der Verschraubung der Zylinderkopfhaube 2 mit dem Zwischenträger 9. Am Stift 14 kann eine Schraubdichtung 16 vorgesehen sein.As in Fig. 2 and 3 The fuel injection nozzles 5 are clamped in a sealing manner with the sealing sleeve 6 by a clamping claw 13 arranged on the cylinder head cover 2. For this purpose, the cylinder head cover 2 a Spannpratzenaufnahme, which may be a pin 14 as shown, which extends through a corresponding hole in the clamping claw 13 and has at its free end a thread for receiving a cap nut 15. The pin 14 may be integrally formed with the cylinder head cover 2 or inserted into this or screwed to it. Conveniently, the pin 14 also serves to screw the cylinder head cover 2 with the intermediate carrier 9. The pin 14, a screw 16 may be provided.

Ein Ende 17 der Spannpratze 13 stützt sich auf einer Abstützfläche 18 auf der Zylinderkopfhaube 2 ab. Ein weiteres Ende 19 ist mit der Kraftstoffeinspritzdüse 5 derart in Eingriff, daß es beim Festdrehen der Hutmutter 15 eine auf den Zylinderkopfboden 3 gerichtete Kraft auf die Kraftstoffeinspritzdüse 5 ausüben kann. Hierzu kann das Ende 19 gabelförmig die Kraftstoffeinspritzdüse 5 umgreifen und auf eine nicht dargestellte, vorzugsweise umlaufende Schulter am freien Ende der Kraftstoffeinspritzdüse 5 drücken. In weiteren Ausgestaltungen sind anstelle der Schulter zwei Auflagen oder Taschen 20 oder dgl. vorgesehen, vgl. Fig. 4. Das Ende 19 kann auch in eine Nut an der Kraftstoffeinspritzdüse 5 eingreifen.One end 17 of the clamping claw 13 is supported on a support surface 18 on the cylinder head cover 2. Another end 19 is engaged with the fuel injector 5 so that it can exert a force directed toward the cylinder head bottom 3 upon tightening the cap nut 15 to the fuel injector 5. For this purpose, the end 19 forked the Embrace fuel injector 5 and press on a not shown, preferably circumferential shoulder at the free end of the fuel injector 5. In further embodiments, two pads or pockets 20 or the like. Provided instead of the shoulder, see. Fig. 4 , The end 19 may also engage in a groove on the fuel injector 5.

Der zwischen der Kraftstoffeinspritzdüse 5 und der Zylinderkopfhaube 2 verbleibende umlaufende Spalt kann gegen Umwelteinflüsse (z.B. Staub) beispielsweise mit einer Filzdichtung verschlossen werden. Leckagekraftstoff kann durch diese Dichtung austreten und zur Anzeige gebracht werden oder in einer Leckleitung gesammelt und dem Kraftstoffsystem wieder zugeführt werden.The circumferential gap remaining between the fuel injection nozzle 5 and the cylinder head cover 2 can be sealed against environmental influences (e.g., dust) with, for example, a felt gasket. Leakage fuel may leak through this seal and be displayed or collected in a leakage line and returned to the fuel system.

Claims (6)

  1. A cylinder head (1) for a direct injection internal combustion engine, which cylinder head (1) comprises a fuel injection nozzle arranged so as to be in an upright position between two camshafts, having a cylinder head cover (2) which comprises a through-aperture (8) for inserting the fuel injection nozzle (5), having a cylinder head base (3), a seat at the base end for the fuel injection nozzle (5) and having a sealing sleeve (6) which extends from the through-aperture (8) to the cylinder head base (3) and which encloses the fuel injection nozzle,
    characterised in
    that there is provided an intermediate carrier (9), that the sealing sleeve (6) fits into the intermediate carrier (9) and is guided in the intermediate carrier (9) and that, on the cylinder head cover (2), neighbouring to the through-aperture (8), there are provided receiving means for a tensioning claw and a supporting face (18) for one end of a tensioning claw (13).
  2. A cylinder head according to claim 1,
    characterised by
    a tensioning claw (13) supported by one end (17) on the supporting face (18).
  3. A cylinder head according to claim 1 or 2,
    characterised in
    that the receiving means of the tensioning claw are provided in the form of a pin (14) which extends through the cylinder head cover (2) and which comprises a thread at its free end.
  4. A cylinder head according to claim 3,
    characterised by
    a cap nut (15) which can be threaded on to the pin (14) for tensioning the tensioning claw (13).
  5. A cylinder head according to any one of claims 1 to 4,
    characterised in
    that the intermediate carrier (9) is threaded to the cylinder head cover (2) via the receiving means for the tensioning claw.
  6. A cylinder head according to any one of claims 1 to 5,
    characterised in
    that the sealing sleeve (6) is sealed relative to the intermediate carrier (9) and/or relative to the cylinder head cover (2).
EP03750475A 2002-09-30 2003-09-02 Cylinder head for a direct injection internal combustion engine Expired - Lifetime EP1583895B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10245853 2002-09-30
DE10245853 2002-09-30
DE10304392A DE10304392A1 (en) 2002-09-30 2003-02-04 Cylinder head for a direct injection internal combustion engine
DE10304392 2003-02-04
PCT/EP2003/009719 WO2004031562A2 (en) 2002-09-30 2003-09-02 Cylinder head for a direct injection internal combustion engine

Publications (2)

Publication Number Publication Date
EP1583895A2 EP1583895A2 (en) 2005-10-12
EP1583895B1 true EP1583895B1 (en) 2008-03-12

Family

ID=32070706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03750475A Expired - Lifetime EP1583895B1 (en) 2002-09-30 2003-09-02 Cylinder head for a direct injection internal combustion engine

Country Status (7)

Country Link
EP (1) EP1583895B1 (en)
JP (1) JP2006501406A (en)
CN (1) CN1685139A (en)
AT (1) ATE389105T1 (en)
AU (1) AU2003270136A1 (en)
DE (2) DE10304392A1 (en)
WO (1) WO2004031562A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2925599A3 (en) * 2007-12-19 2009-06-26 Renault Sas Internal combustion engine i.e. direct injection type internal combustion engine, has cylinder head including tube locked against side of head by cover, where upper end surface is found in plane of machined upper surface of head
CN102168638A (en) * 2011-05-25 2011-08-31 中国兵器工业集团第七○研究所 Fuel injector bush
DE102022211054A1 (en) * 2022-10-19 2024-04-25 Robert Bosch Gesellschaft mit beschränkter Haftung Fuel injector arrangement for mounting a fuel injector in an internal combustion engine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527263A (en) * 1968-09-04 1970-09-08 Continental Aviat & Eng Corp Rocker shaft support with fuel nozzle supporting means
US3945353A (en) * 1974-11-29 1976-03-23 Allis-Chalmers Corporation Two phase nozzle cooling system
DE19511703A1 (en) * 1995-03-30 1996-10-02 Bayerische Motoren Werke Ag Device for fastening an injection nozzle, in particular to the cylinder head of an internal combustion engine
IT1284691B1 (en) * 1996-07-23 1998-05-21 Iveco Fiat INJECTION ENDOTHERMAL ENGINE
DE10012571A1 (en) * 2000-03-15 2001-09-20 Bayerische Motoren Werke Ag Fastening device for a fuel injector in / on an internal combustion engine

Also Published As

Publication number Publication date
DE50309387D1 (en) 2008-04-24
EP1583895A2 (en) 2005-10-12
WO2004031562A2 (en) 2004-04-15
CN1685139A (en) 2005-10-19
WO2004031562A3 (en) 2005-05-06
AU2003270136A8 (en) 2004-04-23
AU2003270136A1 (en) 2004-04-23
DE10304392A1 (en) 2004-04-08
ATE389105T1 (en) 2008-03-15
JP2006501406A (en) 2006-01-12

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